Circulating method for cold regenerated catalyst and catalytic cracking reaction regenerating system

Abstract

The invention provides a circulating method for a cold regenerated catalyst and a catalytic cracking reaction regenerating system. The catalytic cracking reaction regenerating system comprises a hoisting pipe reactor, a pre-hoisting section, a regenerator, a heater and a gas-solid annular flow mixing stripper, wherein the gas-solid annular flow mixing stripper is used for mixing a first solid grain and a second solid grain at different temperatures during a regenerating form fluid catalytic cracking process and stripping the smoke and air taken by the solid grains after being mixed; the first solid grain is a low-temperature catalyst or low-temperature to-be-generated agent; and the second solid grain is a high-temperature catalyst. The circulating method for the cold regenerated catalyst comprises the following steps of: mixing and exchanging heat of the first solid grain from the heater and the second solid grain from the regenerator in the gas-solid annular flow mixing stripper, and meanwhile, stripping the taken smoke and air, forming the mixed catalyst and then entering into the pre-hoisting section.

Description

technical field

[0001] The invention relates to the field of petrochemicals, and relates to the cooling cycle technology and stripping of catalysts in the fluid catalytic cracking process. Mixing of two catalysts (between regenerated and / or spent) at different temperatures between tube and fluidized bed and stripping of solid particles in the mixture. Background technique

[0002] The catalytic cracking reaction regeneration system usually consists of a riser reactor, a regenerator and a transfer pipeline. After the raw oil is atomized through the nozzle, it contacts with the high-temperature regenerated catalyst in the riser reactor, gasifies, undergoes thermal cracking reaction and catalytic reaction, at the same time, condensation reaction occurs and coke is produced, and the coke adheres to the surface of the catalyst to deactivate the catalyst , the deactivated catalyst (deactivated catalyst) is separated by the gas-solid separation equipment at the outlet of the riser...

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